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Barioperovskite, BaTiO_3, a new mineral from the Benitoite Mine, California

Ma, Chi and Rossman, George R. (2008) Barioperovskite, BaTiO_3, a new mineral from the Benitoite Mine, California. American Mineralogist, 93 (1). pp. 154-157. ISSN 0003-004X. doi:10.2138/am.2008.2636.

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Barioperovskite, ideally BaTiO_3, is a new member of the perovskite group. It is found as micro- to nano-crystals in a host of amorphous material contained within hollow, tubular inclusions in benitoite from the Benitoite Mine, San Benito County, California, U.S.A. The mean chemical composition determined by electron-microprobe analysis is (wt%) BaO 65.46, TiO_2 34.57, SiO_2 0.89, sum 100.92. The empirical formula calculated on the basis of 3 O is Ba_(0.97)Ti_(0.98)Si_(0.03)O3. Barioperovskite is orthorhombic, Amm2; a = 3.9874 Å, b = 5.6751 Å, c = 5.6901 Å, V = 128.76 Å3, and Z = 2. The electron backscattered diffraction pattern is an excellent match to that of synthetic BaTiO_3 with the Amm2 structure. The strongest calculated X-ray powder diffraction lines from the synthetic BaTiO_3 data are [d in Å, (I), hkl] 4.018 (18) (011), 2.845 (30) (002), 2.830 (100) (111), 2.316(20) (102), 2.312 (23) (120), 2.009 (28) (022), 1.640 (17) (113), 1.637 (19) (131), 1.633 (18) (202), and 1.415 (15) (222). The mineral is named after its composition, a Ba-dominant member of the perovskite group.

Item Type:Article
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URLURL TypeDescription
Ma, Chi0000-0002-1828-7033
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2008 American Mineralogist. Manuscript received March 16, 2007. Manuscript accepted September 11, 2007. Manuscript handled by Sergey Krivovichev. This work was funded, in part, through grant EAR-0337816 from the U.S. National Science Foundation and, in part, by the White Rose Foundation. The Caltech GPS Analytical Facility is supported, in part, by grant NSF EAR-0318518. We thank Anton Chakhmouradian and an anonymous reviewer for their constructive reviews.
Group:UNSPECIFIED, UNSPECIFIED, Division of Geological and Planetary Sciences
Funding AgencyGrant Number
White Rose FoundationUNSPECIFIED
Subject Keywords:Barioperovskite, new mineral, barium titanate, perovskite group, Benitoite Mine, BaTiO3, BaTi2O5, BaTi3O7
Issue or Number:1
Record Number:CaltechAUTHORS:20130501-104955382
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Official Citation: Chi Ma and George R. Rossman Barioperovskite, BaTiO3, a new mineral from the Benitoite Mine, California American Mineralogist, January, v. 93, p. 154-157, doi:10.2138/am.2008.2636
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38207
Deposited By: Ruth Sustaita
Deposited On:01 May 2013 18:05
Last Modified:09 Nov 2021 23:36

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